Electric-wire insulator.



s; NUNN.

ELECTRIC WIRE INSULATOR.

APPLICATION FILED APR. 12, I912- PatentedJuly 13, 1915.

To all 'w ho mma e concern Beit known that I, s v sm a:-

citizen; of the .fUnited States, residing at:

ortland, gt Q ntY O. ll Qln State of Oregon, have: invented. a. new {and useful Electric wire Insulator, of the foll owinggis afspe'cification.

" :My invention ,rgfaph', ,telephone landiotherjelectric jiline "wires, and ha for. its. .obj ec'tfkto" provide, an insulator, w chea 'fto'm h 1 r 8 simple in.v construction, f ur n h gh y efi'icient in djwhichwilljpermitjsl'aelpto be'mken upfrom, fullya mile of line in one operation.

1'5 .it ao h ie il 'adva te siq y ve will; appear. in the'e urse of the. folhM QQm 1 isiian celevation myimprovedinsulator. E r

insulator .with the jcapf remo g J dra aver cal sectional: Fofifthe 12111 new; f th ved;

. g gtathe drawing, which 1 trates the preferred" form pi, my invention, 5designates the body of the, insulator, which is cylindricalin its general outline. Its eX terna i hapeidues -not if eh ad l r m the ordinaryinsulators. The body isjp ro vided withan upwardly extending centrally disposedsocke't or recess 6, which extends inwardly-fromthelower 'end'or bottom and has its upperpart tapered and screw threaded for thereception' of the usualsupporting pin. "The-lower partof the recess is 'unthreaded; and slightly enlarged in diameter the inner'and outer sidesj so-as' to meet at a jcircular intermediate edge 8,: which constitutes a water drip for'the'insulatori 'The'b'ody .5 is gradually tapered or inclined inwardly from its lower end :to a

point just above, its center where it is abruptly curved "outwardly and around to form a projectingcircumferential rib 9,1 and is then curvedfaroun'd inwardly to form an adjoining groove 9. "From the upper edge of the groove, the.-.side,;of the body is extended up straight and thencutinwardly to form'a. beveled edge 10. J

Centrally'of -the top of the body 5 is I integral vertical projection :11 which is body,"thereby leaving aflat shoulder-12 at formed by-r'educing the diameter of the thegba'se ofth'e projeotioni The projection is P ded'with a diametrically disposed Iverrelates'. to insulators ;tele

f- 'Specifi ca tionof L ttersratent. ,P t t'd J 1 l13,1 15 ."jhpplication iiled sp iliaue a ser am esazea lticalislot, 13, which, extends entirely through the projection and down into. and diametrically: throughthe-upper partof the body 5,

form ng horizontally disposed laterally .ex-' tendlng branches. The bottom of the slotis wate manates concaved orlcurved in cross-.sect'iom and is v straight along its bottom except at the outer ends fof the said branches, where that portion 'ofthexslotwhich extends through the *top. of the body is' outwardly beveled or flared to ,form'lips 14. The vertical slot and thebranches thereof forma wire receiving passage extending through the insulator.

The xplOjeClllOIlr 11 ,is exteriorly screw threaded,andjadapted to be screwed .on said projection'is'acylindrical cap or top l5jpro videdwitha rounded outer face.- The cap 15 ishollowed;outv to 'to'rm a centrally disposed circular reo'essjl6, "which is screw threaded in its sidewallsfand'of such a depth, that, when the capfis .screwed'down into placfe thelower end of the capjwill rest upon theshoulder '12 ofthe. body 5, whereby th sid'es o:t; th'e cap will close' and cover that part" of the slot 13' which extends through thep'roj cation 11. The .bott0m; of, the cap, is of adiameter corresponding to that of "the top ofthe "body, andithe cap at its lower outer edge is oppositely beveled, as at17, with respect to the bevel 10 at the top of the body. Also the bevel 17 at the lower edge of the cap corresponds in size with the beveled 'or flared terminals or lips 14 of the branches of thefvertical slot 13, and beveled portions of the screw cap will always lie above the beveled terminals 14 of the branches of the slot 13. This construction will enable an insulated wire or an uninsulated wire to be drawn through the passage way of the insulator and pulled from aboveor below the passage without injuring the wire.

My. insulator, which can be made of molded glass, glazed porcelain or'other suitable material, constitutes an improvement 'oversimilar devices in thatlengths of line,

wire supported and passing through a numi ber of insulators, can be freely moved horizontally from one point to takeup slack in the wire, without touching the insulators, for with myinsulator the wire has a long horizontal bearing extending substantially thelengthof' the diameter of the insulator,

and the line wire is not clamped in the insulator, nor isit given a sharp bend.

Further, in my insulator that portion of the slot; which. gor istitute s the assa 'fqr. the line'wire, lies Wholly ithin the topeofi the body below 1 the shoiiliei, Tsd thafi the cover can bescrewed down-as tightLyjiiSJdQQ- movement.

e 31 eXfellding hr u h" hetOP' f; e 'en it is: desired- 130 xeplzi'ee afi msula-tpr It 111 56 m "t at fliereeess 01 1015 mile} 'ofxlipejfin o e, operation by climbing d ict i yoflthe' electric I ItEL-I S hel-w r i' v 'e 'bbdy of the l'ipslilatdif, jMqi'ebYerfthere fis no d r b i'. 'i i i b kin l is pp i from "thef in su l a tors' folffthe Security ofjthe, line Wire is not der, around the same, sald; projection being exteriorlyt threaded 1nd ipi'ovided. w ithf vertical sloti iztnding downwardly thrbugh ;th r s id pr je om, the pp r e11" sired Without any possibility of clamping .thereof and through the said shduldef theline wire, or inter feriirg with-its" free-g1forming-'-g laterally extending hqrizontell 40 fr 13031 1 1? t e l it r fl' h th Pas e;* 1 d t ap bie il oi iifelf 'nt beveled lat; I the' exteliqrp its ldwer". ed that beveledjportion'sl {will lie eabd flared terminfgils 0f the brm iches 'of lih i in any asmon Of. the Cap; the bevel flaring :tenflinalspf the :hddy andthe In stringing new line' wir, it' is not necessary to remove the ap's l5 ,'of the 1111- 5 5 as, t @ncld thew rca b i y; pushed" through the 0p part of the' slbt tie wires;

d pe de u he l' s Pf I r IL W W ..,What is claiiiiii] 

